ELECTRICITY n.
Atmospheric electricity, any condition of electrical disturbance in the atmosphere or clouds, due to some or all of the above mentioned causes. (e) Magnetic electricity, electricity developed by the action of magnets. (f) Positive electricity, the electricity that appears at the positive pole or anode of a battery, or…
EXHAUST a.
Exhaust pipe (Steam Engine), the pipe that conveys exhaust steam from the cylinder to the atmosphere or to the condenser. Exhaust port (Steam Engine), the opening, in the cylinder or valve, by which the exhaust steam escapes. -- Exhaust purifier (Milling), a machine for sorting grains, or purifying middlings by an exh…
FROST n.
g. -- Frost smoke, an appearance resembling smoke, caused by congelation of vapor in the atmosphere in time of severe cold. The brig and the ice round her are covered by a strange black obscurity: it is the frost smoke of arctic winters. Kane. -- Frost valve, a valve to drain the portion of a pipe, hydrant, pump, etc.…
HIGH-PRESSURE a.
Having or involving a pressure greatly exceeding that of the atmosphere; -- said of steam, air, water, etc., and of steam, air, or hydraulic engines, water wheels, etc.
HYDROMETEOROLOGY n.
That branch of meteorology which relates to, or treats of, water in the atmosphere, or its phenomena, as rain, clouds, snow, hail, storms, etc.
HYGROMETER n.
An instrument for measuring the degree of moisture of the atmosphere. Daniell's hygrometer, a form of hygrometer consisting of a bent glass tube terminating in two bulbs, the one covered with muslin, the other of black glass, and containing ether and a thermometer. Ether being poured on the muslin, the black ball, cool…